Portion of a golf club head



FIG. 1 is a perspective view of a portion of a golf club head showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a heel end view thereof; and,

FIG. 5 is a toe end view thereof.

The unshaded area inside the rounded three-sided shaped region, including the broken line showing of the stripes therein, is for illustrative purposes only and forms no part of the claimed design. The broken line showing the remainder of the golf club head is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a golf club head, as shown and described. 